CN204627438U - Hydraulic telescopic pipe for oil well - Google Patents
Hydraulic telescopic pipe for oil well Download PDFInfo
- Publication number
- CN204627438U CN204627438U CN201520223181.4U CN201520223181U CN204627438U CN 204627438 U CN204627438 U CN 204627438U CN 201520223181 U CN201520223181 U CN 201520223181U CN 204627438 U CN204627438 U CN 204627438U
- Authority
- CN
- China
- Prior art keywords
- tube
- center tube
- annular recess
- wall
- lower center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 210000004907 gland Anatomy 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009699 differential effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to a hydraulic telescopic pipe for an oil well, which comprises an upper central pipe and a lower central pipe, wherein a pressing sleeve is sleeved outside the upper central pipe; the protective pipe sleeve is arranged outside the upper central pipe and the lower central pipe and is contacted with the outer wall of the lower central pipe; the lower central tube is internally sleeved with an unlocking sleeve, the area of the upper end surface of the unlocking sleeve is larger than that of the lower end surface of the unlocking sleeve, and the middle part of the unlocking sleeve is provided with an annular concave part; the side wall of the lower central tube is provided with a lock hole, a lock block is arranged in the lock hole, a groove is formed in the position, corresponding to the lock block, of the inner wall of the protective tube, when the unlocking sleeve is in the initial position, the lock block is located below the annular concave portion, the inner end face of the lock block abuts against the outer wall of the unlocking sleeve, and the outer end face of the lock block abuts against the groove. The lower central tube and the unlocking sleeve are fixed together through a shearing pin. The utility model discloses can carry out automatic compensation to tensile and compression that the tubular column in the pit arouses by pressure or temperature variation, eliminate the tubular column wriggling to the adverse effect of production tubular column.
Description
Technical field
The utility model is about a kind of oil exploitation instrument, particularly relates to a kind of oil well hydraulically extensible pipe.
Background technology
Because oil field is in the middle and later periods of exploitation, inevitable needs in oil well under enter various downhole tool, realize the reasonable application of oil well productivity, instrument in down-hole is by the impact of various factors, inevitable existence elongates or shortens, will affect downhole tool result of use like this, serious may cause operation again, and then affects oily well capacity and add the operating cost of oil well.The telescoping tube working method of current employing is comparatively single, normally can only extend and can not shorten, so range of application just receives certain restriction.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes a kind of oil well hydraulically extensible pipe, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of oil well hydraulically extensible pipe, can be influenced by pressure or temperature and the impact elongated or shortened by offsetting well lower tubular column, thus making downhole tool be in comparatively ideal duty, the normal usefulness playing downhole tool, improves oil well productivity.
The purpose of this utility model is achieved in that a kind of oil well hydraulically extensible pipe, comprises a upper center tube and a lower center tube, and described lower center tube upper end is socketed in the outside of described upper center tube lower end and is fixed by the first fixing pin; Described upper center tube outer cover is provided with a gland; The top of one pillar is threaded in the lower outside of described gland, and the contact site of described pillar and gland is fixed with the second fixing pin and is connected; Described protective pipe sleeve is located at the outside of described upper center tube and lower center tube and contacts with the outer wall of lower center tube; Be arranged with a solution lock tube in described lower center tube and this solution lock tube and lower center tube contact internal walls, the upper surface area of described solution lock tube is greater than its lower surface area, is provided with an annular recess in the middle part of described solution lock tube; The sidewall of described lower center tube is provided with a lockhole, a lock dog is provided with in this lockhole, the position of the corresponding lock dog of inwall of described pillar is provided with a groove, when this unblock is enclosed within initial position, described lock dog is positioned at the below of described annular recess, the inner face of this lock dog is resisted against the outer wall of described solution lock tube, and its outer face is resisted against in described groove; The below sidewall of described lower center tube being positioned at this lockhole is provided with the first tapped through hole, and this first tapped through hole internal thread connects a shear pin, and lower center tube and solution lock tube are fixed together by described shear pin.
In a better embodiment of the present utility model, position corresponding with described shear pin on the sidewall of pillar is provided with the second tapped through hole, the internal diameter of described second tapped through hole is greater than the internal diameter of described first tapped through hole, and this second tapped through hole internal thread connects a sealing plug.
In a better embodiment of the present utility model, the middle part of lower center tube inwall is provided with an annular protrusion, and this annular protrusion is positioned at the annular recess of described solution lock tube, and the width of annular protrusion is less than the width of annular recess; The sealing of this annular protrusion is resisted against on the bottom surface of annular recess.
In a better embodiment of the present utility model, separate the lock tube wall thickness be positioned at above annular recess and be greater than the wall thickness be positioned at below annular recess, and this solution lock tube be positioned at the outer wall above annular recess and be positioned at outer wall below annular recess all with the contact internal walls of described lower center tube, the inner face of described lock dog is resisted against this solution lock tube and is positioned on the outer wall below annular recess.
In a better embodiment of the present utility model, the edge, outer face of lock dog is provided with the first inclined-plane of convergent outside side direction lock dog in lock dog, is provided with the second inclined-plane with this first inclined-plane corresponding matching in the groove of described pillar inwall.
In a better embodiment of the present utility model, gland top and upper center tube contact position are provided with first group of sealing ring, described gland bottom and pillar contact position are provided with second group of sealing ring, and described solution lock tube is positioned at outer wall above annular recess and described lower center tube contact position is provided with the 3rd group of sealing ring; The 4th group of sealing ring is provided with between described annular protrusion and the bottom surface of annular recess.
In a better embodiment of the present utility model, the threaded upper ends of upper center tube connects a top connection, and the upper inside wall of this top connection is provided with screw thread; The lower end of described pillar is threaded a lower contact, and the bottom outer wall of this lower contact is provided with screw thread.
From the above mentioned, auto-compensation is carried out in the stretching that the utility model can be stressed to down-hole string or variations in temperature causes and compression, eliminate string creep to the adverse effect of flow string, improve the stressing conditions of flow string, down-hole string is made to be in desirable duty, to improve its working life, improve oil well productivity.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the utility model oil well hydraulically extensible pipe.
Fig. 2: be the partial enlarged view at A place in Fig. 1.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model is described.
As shown in Figure 1, the utility model provides a kind of oil well hydraulically extensible pipe 100, and comprising left side in the upper center tube 2 and lower center tube 11, Fig. 1 set gradually up and down is top, and right side is bottom.Lower center tube 11 upper end is socketed in the outside of upper center tube 2 lower end and is fixed by the first fixing pin 6, makes both be closely linked.The threaded upper ends of upper center tube 2 is connected with top connection 1, and the upper inside wall of this top connection 1 is provided with screw thread, connects other downhole tool to facilitate.Upper center tube 2 outer cover is provided with a gland 3, and the top of pillar 5 is threaded in the lower outside of gland 3, and the contact site of pillar 5 and gland 3 is fixed with the second fixing pin 4 and is connected.Gland 3 and pillar 5 can move up and down by relative upper center tube 2 together.Gland 3 top and upper center tube 2 contact position are provided with first group of sealing ring 13, and gland 3 bottom and pillar 5 contact position are provided with second group of sealing ring 14.Pillar 5 is set in the outside of upper center tube 2 and lower center tube 11 and contacts with the outer wall of lower center tube 11.The upper portion side wall of lower center tube 11 and the lower sides of gland 3 are all clipped between upper center tube 2 and pillar 5, and pillar 5 is identical with the external diameter on gland 3 top.The lower end of pillar 5 is threaded a lower contact 12, and the bottom outer wall of this lower contact 12 is provided with screw thread, connects other downhole tool to facilitate.Be arranged with a solution lock tube 7 in lower center tube 11 and the contact internal walls of this solution lock tube 7 and lower center tube 11, the upper surface area separating lock tube 7 is greater than its lower surface area, is beneficial to its deblocking, separates in the middle part of lock tube 7 and is provided with an annular recess 71.Separate lock tube 7 and be positioned at outer wall above annular recess 71 and lower center tube 11 contact position is provided with the 3rd group of sealing ring 15.As shown in Figure 2, the sidewall of lower center tube 11 is provided with a lockhole 110, a lock dog 8 is provided with in this lockhole 110, the position of the corresponding lock dog 8 of inwall of pillar 5 is provided with a groove, this solution lock tube 7 is when initial position, and lock dog 8 is positioned at the below of annular recess 71, and the inner face of this lock dog 8 is resisted against the outer wall separating lock tube 7, the outer face of lock dog 8 is resisted against in groove, thus sheath 5 can not be moved up and down relative to lower center tube 11.As shown in Figure 2, the below sidewall of lower center tube 11 being positioned at this lockhole is provided with the first tapped through hole 112, and this first tapped through hole 112 internal thread connects a shear pin 10, and lower center tube 11 and solution lock tube 7 are fixed together by shear pin 10.
Further; as shown in Figure 2; position corresponding with shear pin 10 on the sidewall of pillar 5 is provided with the second tapped through hole 51; the internal diameter of the second tapped through hole 51 is greater than the internal diameter of the first tapped through hole 112; shear pin 10 can be installed or removed by this second tapped through hole 51; second tapped through hole 51 internal thread connects a sealing plug 9, is not damaged in handling process to protect shear pin 10.
Further, the tube wall on lower center tube 11 top is thinner, and the tube wall of bottom is thicker, and the tube wall of middle part is the thickest, and namely the middle part of lower center tube 11 inwall is formed with an annular protrusion 111.Accordingly, separate lock tube 7 wall thickness be positioned at above annular recess 71 and be greater than the wall thickness be positioned at below annular recess 71, and this solution lock tube 7 be positioned at the outer wall above annular recess 71 and be positioned at outer wall below annular recess 71 all with the contact internal walls of lower center tube 11, the inner face of lock dog 8 is resisted against this solution lock tube 7 and is positioned on the outer wall below annular recess 71.This annular protrusion 111 is positioned at the annular recess 71 of separating lock tube 7, and the width W 1 of annular protrusion 111 is less than the width W 2 of annular recess 71, distance affluence amount solution lock tube 7 being had move down, when separating lock tube 7 and moving to bottom, the upper end of annular protrusion 111 is resisted against the upper end of annular recess 71.Annular protrusion 111 sealing is resisted against on the bottom surface of annular recess 71, is provided with the 4th group of sealing ring 16 between the bottom surface of annular protrusion 111 and annular recess 71.
Further, be separated for the ease of the groove of lock dog 8 with pillar 5 inwall, the edge, outer face of lock dog 8 is provided with the first inclined-plane 81 of convergent outside side direction lock dog 8 in lock dog 8, is provided with the second inclined-plane with this first inclined-plane 81 corresponding matching in the groove of pillar 5 inwall.
Hydraulically extensible pipe 100 of the present utility model with under other downhole tool behind target zone position in oil well, when needs hydraulically extensible pipe 100 works (namely pillar can move up and down relative to lower center tube and stretch) time, liquid is squeezed into from oil pipe, liquid enters lower center tube inner chamber, after the fluid pressure in tubing string reaches certain value, because the top area separating lock tube 7 is large compared with bottom area, this difference in areas causes its top stressed greatly stressed compared with bottom, under this pressure differential effect, make that shear pin 10 is stressed to be cut off, and then solution lock tube 7 is moved down, when the annular recess 71 of separating lock tube 7 is completely relative with lock dog 8, lock dog 8 can inwardly return in this annular recess 71, the first inclined-plane 81 due to lock dog 8 outer face acts on and interaction force between lower center tube 11 and pillar 5, make the extruding force that lock dog 8 is inwardly return, now lock dog 8 moves in annular recess 71, lock dog 8 just loses locking action, just can relatively move freely between pillar 5 with lower center tube 11.
When needs trip out tubing string in well, upper lifting pipe post, tubing string drives top connection 1 to move up, top connection 1 drives upper center tube 2 and lower center tube 11 to move up, when lower center tube 11 upper end contacts with gland 3 lower end, moved up together by lower center tube 11 and then drive gland 3, pillar 5 and lower contact 12, and then drive other downhole tool be connected with hydraulically extensible pipe 100 to move up, until trip out whole down-hole string.
From the above mentioned, auto-compensation is carried out in the stretching that the utility model can be stressed to down-hole string or variations in temperature causes and compression, eliminate string creep to the adverse effect of flow string, improve the stressing conditions of flow string, down-hole string is made to be in desirable duty, to improve its working life, improve oil well productivity.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.
Claims (7)
1. an oil well hydraulically extensible pipe, is characterized in that, comprises a upper center tube and a lower center tube, and described lower center tube upper end is socketed in the outside of described upper center tube lower end and is fixed by the first fixing pin; Described upper center tube outer cover is provided with a gland; The top of one pillar is threaded in the lower outside of described gland, and the contact site of described pillar and gland is fixed with the second fixing pin and is connected; Described protective pipe sleeve is located at the outside of described upper center tube and lower center tube and contacts with the outer wall of lower center tube; Be arranged with a solution lock tube in described lower center tube and this solution lock tube and lower center tube contact internal walls, the upper surface area of described solution lock tube is greater than its lower surface area, is provided with an annular recess in the middle part of described solution lock tube; The sidewall of described lower center tube is provided with a lockhole, a lock dog is provided with in this lockhole, the position of the corresponding lock dog of inwall of described pillar is provided with a groove, when this unblock is enclosed within initial position, described lock dog is positioned at the below of described annular recess, the inner face of this lock dog is resisted against the outer wall of described solution lock tube, and its outer face is resisted against in described groove; The below sidewall of described lower center tube being positioned at this lockhole is provided with the first tapped through hole, and this first tapped through hole internal thread connects a shear pin, and lower center tube and solution lock tube are fixed together by described shear pin.
2. oil well hydraulically extensible pipe as claimed in claim 1, it is characterized in that: position corresponding with described shear pin on the sidewall of described pillar is provided with the second tapped through hole, the internal diameter of described second tapped through hole is greater than the internal diameter of described first tapped through hole, and this second tapped through hole internal thread connects a sealing plug.
3. oil well hydraulically extensible pipe as claimed in claim 2, it is characterized in that: the middle part of described lower center tube inwall is provided with an annular protrusion, this annular protrusion is positioned at the annular recess of described solution lock tube, and the width of annular protrusion is less than the width of annular recess; The sealing of this annular protrusion is resisted against on the bottom surface of annular recess.
4. oil well hydraulically extensible pipe as claimed in claim 3, it is characterized in that: the described solution lock tube wall thickness be positioned at above annular recess is greater than the wall thickness be positioned at below annular recess, and this solution lock tube be positioned at the outer wall above annular recess and be positioned at outer wall below annular recess all with the contact internal walls of described lower center tube, the inner face of described lock dog is resisted against this solution lock tube and is positioned on the outer wall below annular recess.
5. oil well hydraulically extensible pipe as claimed in claim 4, it is characterized in that: the edge, outer face of described lock dog is provided with the first inclined-plane of convergent outside side direction lock dog in lock dog, is provided with the second inclined-plane with this first inclined-plane corresponding matching in the groove of described pillar inwall.
6. oil well hydraulically extensible pipe as claimed in claim 5, it is characterized in that: described gland top and upper center tube contact position are provided with first group of sealing ring, described gland bottom and pillar contact position are provided with second group of sealing ring, and described solution lock tube is positioned at outer wall above annular recess and described lower center tube contact position is provided with the 3rd group of sealing ring; The 4th group of sealing ring is provided with between described annular protrusion and the bottom surface of annular recess.
7. oil well hydraulically extensible pipe as claimed in claim 6, is characterized in that: the threaded upper ends of described upper center tube connects a top connection, and the upper inside wall of this top connection is provided with screw thread; The lower end of described pillar is threaded a lower contact, and the bottom outer wall of this lower contact is provided with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520223181.4U CN204627438U (en) | 2015-04-14 | 2015-04-14 | Hydraulic telescopic pipe for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520223181.4U CN204627438U (en) | 2015-04-14 | 2015-04-14 | Hydraulic telescopic pipe for oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204627438U true CN204627438U (en) | 2015-09-09 |
Family
ID=54046478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520223181.4U Expired - Fee Related CN204627438U (en) | 2015-04-14 | 2015-04-14 | Hydraulic telescopic pipe for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204627438U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401499A (en) * | 2016-11-08 | 2017-02-15 | 中国海洋石油总公司 | Telescopic pipe suitable for floating platform testing |
| CN117905395A (en) * | 2024-03-19 | 2024-04-19 | 中石化西南石油工程有限公司 | Multistage adjustable compensation expansion joint for test and use method thereof |
-
2015
- 2015-04-14 CN CN201520223181.4U patent/CN204627438U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401499A (en) * | 2016-11-08 | 2017-02-15 | 中国海洋石油总公司 | Telescopic pipe suitable for floating platform testing |
| CN117905395A (en) * | 2024-03-19 | 2024-04-19 | 中石化西南石油工程有限公司 | Multistage adjustable compensation expansion joint for test and use method thereof |
| CN117905395B (en) * | 2024-03-19 | 2024-06-04 | 中石化西南石油工程有限公司 | Multistage adjustable compensation expansion joint for test and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |